from the description it sounds like Windows and WSL apps can only talk over AF_UNIX socket.

if I understand your intent correctly, this might be what you're looking for: a while back Tim Newsham did ninefs; it uses npfs (ericvh and lionkov) and Dokan. i don't know if there has been any recent development. I forked a copy of ninefs from code.google.com into github, npfs sources are on sourceforge:

https://github.com/9nut/ninefs
https://sourceforge.net/p/npfs/code/HEAD/tree/npfs/

On Sat, Feb 16, 2019 at 12:54 AM Steve Simon <steve@quintile.net> wrote:
interesting...

the first thing, can you convince the 9p server to offer 9p over tcp? then, can explorer mount my plan9 file server?

the biggest surprised is that i don't recognise any of the names of the team listed as 9fans of old.

-Steve

>> On 16 Feb 2019, at 3:57 am, Lucio De Re <lucio.dere@gmail.com> wrote:
>>
>>> On 2/16/19, Kurt H Maier <khm@sciops.net> wrote:
>>> On Sat, Feb 16, 2019 at 01:48:01AM +0100, hiro wrote:
>>> https://blogs.msdn.microsoft.com/commandline/2019/02/15/whats-new-for-wsl-in-windows-10-version-1903/
>>
>> Just when the linux kids finally gave up on 9p2000.l, and introduced
>> virtio-fs, Microsoft shows up to ensconce 9p forever.
> I wonder what the long-term plan really is, though? Process-level
> namespaces? If they can do that, they will leave Linux standing.
>
> Lucio.